How Do You Calculate the Centripetal Force for a Swinging Mass?

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Homework Help Overview

The discussion revolves around calculating the centripetal force required to swing a 4kg mass in a horizontal circle with a radius of 3m, where each cycle takes 2 seconds. Participants are exploring how to derive the necessary force from the given parameters.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the relationship between the period of the swing and the angular velocity, questioning how to convert the period into cycles per second. There is also an attempt to clarify the connection between the periodic time and the force calculation.

Discussion Status

The discussion is active, with participants raising questions about the information provided and its implications for calculating the centripetal force. Some guidance has been offered regarding the need to determine the periodic time to find the force, but no consensus or resolution has been reached.

Contextual Notes

Participants note the limited information provided in the problem statement, which may affect their ability to derive the solution effectively.

Instanbul
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Homework Statement


How much force is needed to swing a 4kg mass in a 3m radius horizontal circle so that each cycle takes exactly 2 seconds. Answer is 118N but the problem is how do I get to that...


Homework Equations


V=2Pir/T F=mv^2/r


The Attempt at a Solution


I tried using F=mv^/r one but I got nowhere close my teacher just solves problems without explaining at all and I have no clue how to solve it except find numbers.


Thank you for your time.
 
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I one cycle takes 2 seconds, how many cycles are in one second? Hence what is the angular velocity of the bat?
 
It doesn't say that's all the info that the problem gives me.
 
Instanbul said:
It doesn't say that's all the info that the problem gives me.

I am quite sure you can find the the number of cycles in 1 second given, that 1 cycle takes 2 seconds.
 
Aren't I looking for the force of the swing?
 
Last edited:
Instanbul said:
Aren't I looking for the force of the swing?

Yes but you need to get the periodic time to get F.
 
Oh I get it now thank you so much.
 

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